Operator`s manual

OPERATION
281
The inflatable airbag is folded into the center of the steering wheel. It
inflates in the event of a serious collision above a certain level, where
the angle of impact, crash severity, speed and nature of the object
involved in the collision all play a part in whether or not the airbag is
activated.
The system consists of a gas generator surrounded by the inflatable
airbag. In the event of a sufficiently violent collision, a control unit
activates the gas generator ignitor and the airbag inflates. To cushion
the impact, the airbag deflates when compressed. This also releases
some nontoxic smoke into the cab. The entire sequence, from inflation
to deflation of the airbag, takes a few tenths of a second.
The SRS system is continually monitored by the control unit. A control
unit is mounted on a bracket above the engine cover which detects
deceleration. The control unit also contains a standby power unit which
can supply the system with power for a short time, in case the normal
supply breaks.
vn-vhd.bk Page 281 Tuesday, July 1, 2008 9:44 AM